Fixed values

[fspralja]

Hello, here the changes

• updated the sensor tag lib dependency to 1.2.2
• fixed value null publishing
• added lux to air values

[fspralja]

before the dataset was:

"evt": {
        "myName": "TI Sensor Tag",
        "pressure": null,
        "humidity": 23.35540771484375,
        "objTemp": null,
        "ambientTemp": 18.03125,
        "temp": null
      }

now after correction:

"evt": {
        "myName": "TI Sensor Tag",
        "pressure": 988.71,
        "humidity": 51.947021484375,
        "objTemp": 18.8125,
        "ambientTemp": 23.3125,
        "temp": 23.39569091796875,
        "lux": 65.92
      }

[ryanjbaxter]

thanks!